It all went wrong.
Drying box too hot, maybe, caused pull away from the darter edges. New batch of epoxy, it skims in the cup and produces clumps when you brush it. That and too much dust in the shop. Some kind of silicone problem in the paint. So now I have 40 odd no-slip darters with pock marks and easy wear edges.
I want to build stuff for other people, but giving away this crap is embarrassing. It was all looking so good right up to that last step.
So it goes.